The planned moves come in response to Trump's announcement that the US will impose a 25% tariff, or tax on imports, on steel and a 10% tariff on aluminum. Soon after Trump's decision Thursday, other nations, including the EU, Canada, and Mexico, promised to respond.

The measures appear to have a veiled message aimed at congressional leaders like House Speaker Paul Ryan, whose district is home to Harley Davidson, and Senate Majority Leader Mitch McConnell, whose home state of Kentucky is a major producer of bourbon.

These Republican leaders, particularly Ryan, are already attempting to convince Trump to reverse course on the tariffs. According to a GOP source, Congress may even take action to curtail the impact of Trump's measures.

Following threats of retaliation from EU leaders, Trump said suggested on Twitter Saturday that counter measures to the counter measures could be on the way.

"If the E.U. wants to further increase their already massive tariffs and barriers on U.S. companies doing business there, we will simply apply a Tax on their Cars which freely pour into the U.S.," Trump said. "They make it impossible for our cars (and more) to sell there. Big trade imbalance!"